From: Alejandro Colomar <alx@kernel.org>
Date: Wed, 8 Mar 2023 01:02:31 +0000 (+0100)
Subject: cmd.mk, install-man.mk: Allow installing link pages as symlinks
X-Git-Tag: man-pages-6.04~78
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=335acbfbbd151b824e53d94c5aec85d2ee5a051a;p=thirdparty%2Fman-pages.git

cmd.mk, install-man.mk: Allow installing link pages as symlinks

We keep them as .so "includes" in our source code, but if some
distribution wants to have them as symlinks in their filesystem, make it
easy for them to install as such, by specifying 'LINK_PAGES=symlink'.

Example:

    $ make install LINK_PAGES=symlink

Signed-off-by: Alejandro Colomar <alx@kernel.org>
---

diff --git a/INSTALL b/INSTALL
index da1e53e6b3..63bbf169b0 100644
--- a/INSTALL
+++ b/INSTALL
@@ -85,6 +85,7 @@ Description
 
           -  For installing:
              -  install(1)
+             -  ln(1)
 
           -  For uninstalling / cleaning:
              -  rm(1)
diff --git a/lib/cmd.mk b/lib/cmd.mk
index 17f3a8ee55..9cd09fe895 100644
--- a/lib/cmd.mk
+++ b/lib/cmd.mk
@@ -16,6 +16,7 @@ GREP       := grep
 GZIP       := gzip
 HEAD       := head
 INSTALL    := install
+LN         := ln
 LOCALE     := locale
 PKG-CONFIG := pkg-config
 SED        := sed
diff --git a/lib/install-man.mk b/lib/install-man.mk
index 174f503ca9..a919c40865 100644
--- a/lib/install-man.mk
+++ b/lib/install-man.mk
@@ -8,10 +8,20 @@ ifndef MAKEFILE_INSTALL_MAN_INCLUDED
 MAKEFILE_INSTALL_MAN_INCLUDED := 1
 
 
+include $(srcdir)/lib/cmd.mk
 include $(srcdir)/lib/install.mk
 include $(srcdir)/lib/src.mk
 
 
+LINK_PAGES := .so
+ifeq ($(LINK_PAGES),.so)
+else ifeq ($(LINK_PAGES),symlink)
+else
+$(warning "LINK_PAGES": "$(LINK_PAGES)")
+$(error Valid values for "LINK_PAGES": [".so", "symlink"])
+endif
+
+
 mandir      := $(datarootdir)/man
 man1dir     := $(mandir)/man1
 man2dir     := $(mandir)/man2
@@ -147,6 +157,12 @@ $(_manpages):
 		-e '/^\.so /s, man7/\(.*\)\.7$$, $(notdir $(man7dir))/\1$(man7ext),' \
 		-e '/^\.so /s, man8/\(.*\)\.8$$, $(notdir $(man8dir))/\1$(man8ext),' \
 		$@
+ifeq ($(LINK_PAGES),symlink)
+	if $(GREP) '^\.so ' <$@ >/dev/null; then \
+		$(SED) 's,^\.so \(.*\),../\1,' <$@ \
+		| $(XARGS) -I tgt $(LN) -fsT tgt $@; \
+	fi
+endif
 
 $(_mandirs): %/.: | $$(dir %). $(_mandir)/.